package com.spzx.cart.listener;


import com.rabbitmq.client.Channel;
import com.spzx.cart.service.CartService;
import jakarta.annotation.Resource;
import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.util.Map;

@Component
public class SpzxCartMqListener {

    @Resource
    CartService cartService;

    //通过队列绑定,订单交换机,路由key需要使用提交订单成功消息的路由key
    @RabbitListener(
            bindings = {
                    @QueueBinding(
                            value = @Queue(value = "spzx.cart.order.submit.queue",
                            durable = "true"),
                            //使用订单服务的交换寄,如果已经存在,直接使用,不存在新创建
                            //已存在,如果本次配置和以前的不一样,会报错
                            exchange = @Exchange(value = "spzx.order.exchange",
                                type = ExchangeTypes.TOPIC),
                            key = "spzx.order.submit.success"
                    )
            }
    )
    public void submitOrderConsumer(Channel channel, Message message, Map<String, Object> map) throws IOException {
        try {
            //1.消费消息的业务
            //删除购物车中订单的购物项
            long userId =Long.parseLong(map.get("userId").toString()) ;
            cartService.deleteCheckedCartInfo(userId);
            //手动ack
            channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);
        }catch (Exception e){
            //重试消费,或者丢弃消息
            if (message.getMessageProperties().isRedelivered()){
                //第二次消费失败,第一次失败会进入else让消息重新回到队列中,可以继续消费
                //丢弃消息,会变为死信
                channel.basicReject(message.getMessageProperties().getDeliveryTag(),false);
            }else {
                channel.basicNack(message.getMessageProperties().getDeliveryTag(),false,true);
            }
        }

    }
}
